KT-3500: ClassFormatError: Duplicate method name&signature in class file && KT-3429: Traits override bug

compiler/testData/codegen/box/traits/genericMethod.kt

@@ -0,0 +1,21 @@
+trait A<T> {
+    val property : T
+
+    open  fun a() : T {
+        return property
+    }
+}
+
+open class B : A<Any> {
+
+    override val property: Any = "fail"
+}
+
+open class C : B(), A<Any> {
+
+    override val property: Any = "OK"
+}
+
+fun box() : String {
+    return C().a() as String
+}